Alexander hill



Quite]: rate/e gaunt ffirr.

IMPROVEMENT IN TANNING.

ALEXANDER HILL, OF DUBUQUE, IOWA.

Letters Patent'No. 60,006, dated November 27, 1866.

SPEQIFIOA'IION. TO ALL WHOM IT MAY GONCERN:

Be it known that I, ALEXANDER HILL, of Dubuque, in the county of i p andState of Iowa, have invented a new and improved Tanning Process; and Ido hereby declare that the following is a full, clear, and, exactdescription thereof, which will enable others skilled in the art tofully understand and m'a'ke use of the i same.

Myinvention consists in a new and improved process of tanning hide, aswill be presently described. The hides and skins are first subjected tothe action of a. liquid, of the following ingredients, and in about' theI proportions stated: Soot, say 1 1b.; sulphuric acid, 1 11).; water, 20gallons. The hides are,kep' t in this solution about twelve hours, whenthey are taken out and worked lightly on the, beam; After this they aresubjected i to the action of aliquid composed of the followingingredients, in about the proportions named: Bengal catechu,

10 lbs. sal ammonia, 1 lb; suflicient water being added to the above toenable the skins to be properly handled daily. This solution should bestrengthened every other day by a sniall addition of catechu, and thehides should he kept in it about ten days, when they maybe removed.Bythis process skinsrnay be tanned in a. very superior manner, and in avery short time. Y

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is i The within mode of treating hides,substantially as specified. i i 1 The above specification of myinvention signed by me this 4th day of September, 1866. v v )HILL.

Witnesses:

D. E. EGAN En. MoBnnY. j

